Novak Djokovic has apologised for crossing the line and touching the chair umpire during his volatile Australian Open final win on Sunday night.
Djokovic is facing the prospect of a hefty fine for twice tapping Damien Dumusois on the foot while remonstrating with the French official during his drama-charged five-set win over Dominic Thiem.
The Serbian lost his cool when he was handed back-to-back time violations in the one game for taking too long to serve.
With the score locked at 4-4 in the second set, the second penalty came at break point and cost him a first serve, with Djokovic losing the game.
[Source: TVNZ/ AAP]
